Levi m



(No Model.)

Y L. M. DEVORE 8a F. W. HOEPER.

SPRING HINGE.

l l La @wir A N. PETERS momumagnphcr, wnshingmn. D4 C` UNITED STATESPATENT OEEicE.

LEVI M. DEVORE AND FREDERICK IV. HOEFER, OF FREEPORT, ILLINOIS,ASSIGNORS TO THE STOVER MANUFACTURING COMPANY, OF SAME PLACE.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 896,650, dated January22, 1889. Application led October 26, 1888` Serial No. 289,182. (Nomodel.)

To all whom it may concern:

Be it known that we, LEVI M. DEVORE and FREDERICK W. HOEEEE, bothresidents of Freeport, in the county of Stephenson and State ofIllinois, have invented certain new and useful Improvements inSpring-Hinges; and we do hereby declare the following' to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use the same.

Our invention relates to spring -hinges adapted to resist the opening ofthe door until the latter is swung through a certain number of degrees,and to resist its closing after it has been still further opened.

In the accompanying drawings, to which this specification refers, Figurel is a plan of the hinge. Fig. 2 a section on the line ma, Fig. l. Fig.3 is a view showing a part of the hinge, looking` in the contrarydirection. Fig. I is a section on the line 'y y, Fig. l.

In our application, Serial N 2G5,ll50, filed February 27, 1888, we havedescribed and claimedv a hinge having certain features in common withthe hinge which is the subject of this application, and we therefore nowclaim only such novelty as may hereinafte appear.

.In the drawings, A A are two leaves provided, respectively, with ears BB and B B', lying at opposite ends ofthe hinge and forming two pairs ofcontiguous ears. These are pivoted in the usual manner, and thus far thehinge presents no novelty. The central por tion of the leaf A is raisedabove the plane of the remainder, forming a partial cylinder with closedends to serve a cover for a spring, C, coiled in helical :form about aslning-arbor, D, whose ends rest in suitable bearings in the end wallsof the springcover. When the spring is in position, with the hingeclosed, its ends both proj eet toward the opposite leaf, an d areconnected, respectively, by links F F to studs or pins E E upon theinner faces of the ears B B of the opposite leaf. In this position theline of the strain exerted by the spring passes below the pintle-line ofthe hinge, and, consequently, the tendency to close the door. Now eitherleaf may be placed on the door and the opposite leaf upon the j amb,since the relative movement is the same in both cases; but, forconvenience in description, the leaf A may with advantage be snp posediiXed upon the j amb. Then this is the case, opening the door carriesthe spring bodily about the hinge-pintle and also about the xed pins EE', gradually increasing the tension upon one or both pins until theline of strain crosses the pintle-line of the hinge. From this point thegradually-decreasing tension tends to hold the door open. It isdesirable, though not absolutely essential, that the lines of strain atthe two ends of the hinge should cross the pintle-line at the sameinstant. To accomplish this result it is necessary, since the two endsof the spring pass, respectively, to the top and to the bottoni of thecoil, to place the pins E E in different positions with reference to thepintle-line.

Ie are aware that is not new to construct a hinge that holds the doorshut or open aecording to the position of the latter when it is left tothe action of the hinge alone, and also that it has been proposed toplace the spring at one side of the pintle-line in this class of hinges5 but the construction set forth is thought to secure desirable resultsin a novel. manner and to offer material advantages, since the completehinge has but four pieces, and these of such form that most of the usualexpense of cores is avoided.

l. The combination of two suitably-con nected hinge-leaves, one of whichis provided at each end with a pivotal stud or pin, a spring-coilmounted parallel to the hinge-axis upon the other of said leaves, andlinks connecting, respectively, the ends of said spring with said pins,substantially as set forth.

2. The combination, with the leaf A, provided with the pins E E', andthe leaf A, joined to the leaf A by suitable pint-les, of thespring-arbor D, mounted in suitable bearings upon the leaf A, the springC, coiled about said arbor, and the links F F, connect ing the ends ofsaid spring with said pins, respectively, substantially as and for thepurpose set forth.

In testimony whereof we have signed this specification in the presenceof two subscribin witnesses. i

.LEVI M. DEVORE,

FREDERICK XV. lI'OEFER.

\Vitnesses:

MICHAEL S'rosKoPr, LEONARD S'rosKoPE.

IOO

